Forming tool for channeler bits



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L. c. BAYLES FORMING TOOL FOR CHANNEL-ER BITS Filed Jan. 24, 1924 2Shaets-Sheet. 2

h I I I an'uawtoz I Zea/7'6 C Be les Patented Dec. 2, 1924.

FIE.

LEWIS C. BAYLES, OFEASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL- RANDCOM- PANY, 0F JERSEY CITY, NEW J ERSEY, A CORPORATION OF NEW JERSEY.

FORMING TOOL FOR CHANNELER BITS.-

Application filed January 24, 1924. Serial No. 688,175.

T 0 (all whom it may concern:

Be it known that I, LEWIS C. BAYLES, a citizen of the United States, anda resident of Easton, county of Northampton, and State of Pennsylvania,have invented a. certain Forming Tool for Channeler Bits, of which thefollowing is a specification accompanied by drawings;

' This invention relates to rock drilling and more particularly todevices for forming or sharpening the bits of channeler steels.

In certain types of channeler machines, the cutting is done bygangisteels assembled from a number of steels laid side by side andhaving edges of various forms and in clined at various angles. A notuncommon arrangement of steels is that in which alternate steels areprovided with cutting edges parallel to one face of the shank while theintermediate cutting edges are arranged diagonally. The cutting edges ofthese bits areusually longer than the corresponding dimensions of theshank. That is to say, they are flared out in forming, so as to cut achannel in the rock slightly wider than the shanks, to provide adesirable clearance. Preferably the shanks of the individual drillsteels are rectangular in cross section, somewhat narrower than they aredeep.

In forming the diagonally disposed bits, it is desired that the shank beheld rigidly against rotation and this has been diflicult to do by amachine, on account of the inclination of the cutting edge of thediagonal of the shank. The couple formed by the force of the swagingdies against the corners, tends to rotate the steel and produces errorsin the shape of the bit. If the shank is held ina stationary vise orother fixed device during the swaging process, it is difiicult toproduce exactly the right inclination in the flattened faces of the bit.

It is accordingly an object of this invention to enable a person.forming bits on the steels of this character to hold the steel againstrotation without interfering wiih the lateral or up or down movementwith respect to the swaging dies.

Other objects of the invention become apparent from the followingdescription, taken in connection with the drawings showing oneembodiment, and in which Figure 1 is a perspective view showing a numberof steels grouped together to form part of a gang steel for use in achanneling machine;

Figure 2 is a cross section of one of the steels having an angularlydisposed cutting edge;

Figure 3 is a perspective view in vertical longitudinal section of theswaging dies and a member for holding the channeler steel againstrotation;

Figure 4 is a perspective view in longitudinal vertical section showinga steel in position between the dies and indicating the manner in whichsteel is permitted to move downwardly during the process of forging orswaging;

Figure 5 is a perspective view of the lower dies and a member forholding a channeler steel against rotation;

Figure 6 is a perspective view of a bit having its cutting edgediagonally disposed in one direction, and

Figure 7 is a perspective View having its cutting edge diagonally intheother direction.

Referring to the drawings, Figure 1 shows an ass'emblyot steel for usein the channeling which comprises a plurality of steels A, havingcuttingedges parallel to the longer faces of the shank while the steels B, Cand D, which are placed between the steels A are each provided with abit having a cutting edge diagonally disposed. As shown in Figure 1, theedges 13, C and D are alternately right and left hand. That is to say,the diagonals alternate their inclination. The reason for arranging thesteels in this Inanner,'is sothat the entire group of steels movinggradually along the channel present cutting edges which are inclined atvarious angles of the faces of the rock and more easily cut the widththerein.

In Figure 2 there is shown a cross section of one of the diagonal edges,such as for instance B, the edge being shown at broken lines E. Informing such a bit, the steel must, be laid on the forming dies or anvilwith its diagonal F-Fparallel to the faces of the die. Blows are struckagainst the steel at the corners G to form the flattened faces H of thebit. When the steel is in this position, blows struck in this mannertend to rotate the steel.

The device for swaging the bit on the steel is shown in Figures 3, l and5, in which there is provided a pair of dies J and K which are adaptedto reciprocate toward each other in any suitable manner such as in thedrill steel sharpener, a drop hammer Or other forging machines. Thelower die K is provided with a flat face L and the upper die J isprovided with a similar flat face 0, opposed to the face L and inclinedthereto at an angle corresponding to the desired inclination of the face.H of the bit.

Preferably the lower die K is stationary and .is provided with arearward extension P having a T-slot Q extending laterally therein.Means for holding the shank of the steel is provided andcomprisesaholding member or block R having a dove-tail S on its lower face bywhich the block R is freely slidable laterally in the T-slot Q. In theupper portion of the block it there are provided slots T and U angularlydisposed with respect to each other, each of the slots being just wideenough to receive the rectangular shank of the steel. If it is desiredto form a right handed bit as for instance C, a steel is inserted in theslot U. If it is desired to form the left hand bit, such asshown at B,the steel is inserted in the slot T which is at an angle to the slot Uand therefore forms the bit with its cuttingedges inclined in theopposite direction. The slots T'and U are sufliciently deep so that theshank of the steel does not quite reach the bottom when the bit has beencompletely forged. It is noted that when the steel is first placedbetween the die and in one of the slots, such as for instance U, thesteel extends a considerable distance in the slot and away from thebottom. thereof, but'as the swaging. proceeds the steel sinks down intothe slot and the depth thereof is sufficiently deep so that the steelmay never rest at the-bottom of the slot. The process of forming-thesteel bit is indicated in Figures 3, 4, and 5. Referrin to Figure 3,unformed steel is fitted in the slot, as for instance U in the block orholding member R so as to extend well in between the dies J and K. Withthe steel in this position, blows are struck on the steel by meansof-the upper die J which gradually flattens out the end of the steel tothe shape shown in Figures 4 and 5. As the end of the steel is flattenedout, its shank drops down in the slot U and the holding member R slideslaterally in the T-slot Q so as to permit the lowering of the steel. Ifdesired the block It may be arranged to move vertically with respect tothe die K so as to drop the steel vertically without permittingrotation. In swaging the steel, a feather Vmay be formed on the extremeend of the bit which may be thereafter cut off, and the bit sharpened inany desired manner.

I claim:

1. A device for forming channeler bits, comprising a pair of swagingdies adapted to reciprocate toward and away from each other, theopposing faces of said dies being angularly disposed with respect toeach other, and means for holding the bit against rotation only, whilein position between the dies, whereby free lateral and vertical movementthereof is permitted.

2. A device for forming channeler bits, comprising a pair of swagingdies adapted to reciprocate toward and away from. each other, theopposing faces of said dies being angularly disposed with respect toeach other, and means for holding the bit against rotation only, whilein position between the dies, comprising a holding member slotted tocooperate with the sidesof the drill bit and slid ably mounted on one ofsaid dies.

3. A device for forming channeler bits, comprising a pair of swagingdies adapted to reciprocate toward and away from each other, theopposing. faces of said dies being angular-1y disposed with respect toeach other, and means for holding the bit against rotation only, whilein position between the dies, comprising a holding, member slidablymounted on one of said dies to permit the lateral movement, and slottedto cooperate with the sides of the said bit whereby said bit ispermitted vertical and lateral movement.

at. A device for forming channeler bits, comprising a pair of swagingdies adapted to reciprocate toward and away from each other, theopposing faces of said dies being angularly disposed with respect toeach other, means for holding a rectangular bit against rotation only,while in position on a diagonal of the bit between the dies.

A device for forming channeler bits comprising a pair of dies adapted toreciprocate toward and away from each other, said dies being angularlydisposed with respect to each other, th lowermost die being providedwith a T-slot, a holding member slid-able laterally in said T-slot, andapertured to receive the drill steel for holding the latter againstrotation only whereby said channeler bit is permitted to move verticallyand laterally with respect to said swaging dies.

In testimony whereof I have signed this specification.

LEWIS O BAYLES.

